After trying to install an HD sat. receiver in my bonus room (the same place my modem resides for TWC cable/phone service) I realized that this is not possible on the same line with my current configuration. Directv diplexed my existing cable line for the initial SD installation. I assume these details are not available to Directv Tech Support operators when I recently tried to install my HD receiver. It took a visit from a Tech to make this discovery. I would really prefer not to drill for a second line in my bonus room. While I might could set my modem up downstairs, my digital phone line is installed upstairs....plus my only PC is upstairs such that I can control the router, network, etc. What are my options? Do I just need a way to up-convert the lower band HD Sat prior to diplexing in the cable signal? I have been reading quite a bit about the SWM-8 and diplexing and it sounds like this could be an option but, is there something else besides the SWM-8 that will do the conversion for me? If I did use a SWM, should I use the OTA for cable or should I diplex it in after the power amp? I have also read that cable and HD Sat may no be optimal on the same line. Does this apply to any cable signal or to a specific application(broadband, digital phone, cable TV) ? Note: I have no plans to use MRV.